Machine for truing wheel-rims.



No. 689,608. PatentedDee. 24, l90l.

E. EINF'ELDT.

I ACHINE FUR TRUING WHEEL RIMS.

(Application filed Aug. 15, 1901.)

(No Model.)

s 2 I i H 5 5 l I I Z 5 3 9 UNITED STATES PATENT OFFICE.

EMIL EINFELDT, OF DAVENPORT, IOWA, ASSIGNOR TO BETTENDORF, METAL WHEEL COMPANY, A-OORPORATION OF ILLINOIS.

MACHINE FOR TRUING WHEEL-RIMS.

EiIPECIFIGATION forming part of Letters Patent No. 689,608, dated December- 24, 1901.

Application filed August 15, 1901. erial No. 72,118. (No model.)

To all whOm/ it may 6. The ring is connected firmly with the Be it known that I, EMIL EINFELDT, of Davoverhead beam by posts 7, spaced apart about enport, county of Scott, and State of Iowa, one-third the distance around the ring, and have invented a new and usefulImprovement it is given further support by means of a third 55 in Machines for Truing Wheel-Rims,of which post 8 while the rim is being forced therethe following is a specification. through, which post is removable in order to In the formation of metal wheels it is now permit of the rim being removed after it has the practice under certain modes of manupassed through the die. The lower portion facture to form the rim complete with its of the internal surface of the die is inclined 6o 10 ends connected and to subsequently secure or flaring, as at 9, to faiiilitate the entrance the spokes thereto. The rim is formed from of the rim to the active surface 2, which is a plate or strip of metal which is bent into truly cylindrical, with parallel sides and of a approximately circular form, and for certain diameter slightly smaller than that of the classes of wheels it is provided with inwardlyrim. The space between the upper edge offl6 :5 turned flanges on its edges. After its ends the ring and the supporting-beam is slightly are connected it frequently happens that the greater than the width of the rim in order that rim is not truly circular or as nearly circular the latter may pass entirely through the die. as is demanded in practice. The pressure-head 3 isof circular cylin- It is the aim of this invention to overcome drical form and of a size adapted to fit snugly 20 these objections; and the invention consists Within the die, and it may be operated in in combining with a suitable support an openany suitable manner, preferably by hydraulic ended die sustained by the support, so as to means. It is fixed on the upper end of a leave a free open space above the die for the plunger 10, guided in the base-frame, so that removal of the finished rim and a pressurevas it rises under the influence of its operatz 5 head on the opposite side of the die adapted ing means it will carry the pressure-head upto advance the rim upward wholly through ward through the die, as illustrated in Fig. 2. the same. I In the operation of the mechanism the rim The invention consists also in the details is set in place on the pressure-head with its of construction and combination of parts hereupper edge in position to enter truly the flar- 8o o inafter described and claimed. ing mouth of the die. On the riseof the pres- In the accompanying drawings, Figure 'l is sure-head the rim will enter the die and be a vertical longitudinal section through my subjected to end pressure, and as itis graduimproved machine, showing the rim in posially advanced it will receive a uniform tion ready to be advanced through the die. squeezing action throughout its entire cir- 35 Fig. 2 is a similar view showing the rim after cumference, being contracted slightly as it its passage through the die ready to be re-- passes through the active surface 2 of the die moved from the machine. and receiving a permanent set of true circu- Referring to the drawings, the form of the lar form. Its advance is continued until it mechanism may be varied considerably withpasses entirely through the die, when it will 0 in the limits of my invention, the essential rest on the upper edge of the same, as indicharacteristics being a die 1, having an incated in Fig. 2. During this operation the ternal active surface 2,-of circular form, and removable post 8 is in place, and after the a cooperating surface 3, adapted to support passage of the rim this post is removed, so the rim in its passage through the die. The that the rim may be withdrawn horizontally 9 5 5 die may be either fixed or movable; but'I from the machine. It has been found that prefer the construction shown, wherein it is this action is of unusual eifectiveness, pari, fixed and wherein the supporting-surface 3 is ticularlyin connection with wide-flanged rims, movable in the form of apressure-head. The which are used for binder and harvester die is in the form of a ring firmly fixed bewheels and others of a similar character, in 5o neath a cross-beam 4:, mounted on the upper that it trues them and gives them a circular end of standards 5, rising from a fixed base form without injury in any manner either by l buckling or bending, the action of the die being gradual and the pressure exerted uniformly at every point in the circumference of the rim in alateral direction and on its lower edge in a horizontal direction, an upsetting action taking place, due to the endwise pressure being resisted by the lateral pressure and resulting in the rim being given a permanent set.

Having thus described my invention, what I claim,is

1. In an apparatus for truing wheel-rims, the combination with a horizontal open-ended die of a diameter slightly less than the rim to be trued, of a support for the same arranged to leave a space above the die wider than the width of the rim, and means for forcing the rim upward wholly through the die and into said space; whereby the rim after its passage through the die will rest on the upper edge of the same whence it may readily be removed.

2. In combination with an overhead support, a die sustained thereunder with a space between its upper edge and thelowcr surface of the support wider than the rim to be acted on, said die being of a diameter slightly less than that of the rim, and means for advancin g therim upward entirely through said die; whereby the rim after its passage through the die will rest on the upper edge of the same whence it may be removed.

3. In combination with across-beam, a die sustained thereunder at a distance greater than the width of the rim to be acted on, a detachable support adapted to be inserted between the rim and die to firmly sustain the latter while the rim is being advanced through the die, said support adapted to be detached to permit the removal of the rim after its passage through the die, and means for advancing the rim entirely through the die.

In testimony whereof I hereunto set my hand, this 17th day of June, 1901, in the pres ence of two attesting witnesses.

EMIL EINFELDT.

Witnesses:

NA'IH FRENCH, MAY L. DODGE. 

